Bought these '63-'68 fender emblems to add a cool touch to my 2012 white convertible base V6 Mustang and pay homage to the upcoming 50 year anniversary of the one true American muscle car. The quality of these is excellent.
To apply, clean the fender area with isopropyl alcohol (from CVS / Walgreens). Decide on your location on one fender, mark the top edge with a pencil and ensure it's horizontal using a small spirit level. Remove the adhesive strip backing paper, line up the top of the emblem to the pencil mark and swing down into position from that top edge. Apply firm pressure to bond the adhesive. To position the other side the same, now measure the top edge of the applied emblem from the ground (I'm assuming you're on level concrete)and measure the rear edge from the rear lip of the fender. Note the measurements and mark the horizontal (check for level) and vertical lines on the other fender. Double check everything, then apply the emblem as before. Re-polish the area and enjoy!